Improvement in railroad frogs



UNITED STATES PATENT OFFICE.

JOHN II. LAKEY, OF TURNER, AssIGNoE To GEORGE w. vBILLINGs, OF

` CHICAGO, ILLINOIS.

IMPROVEMENT IN RAILROAD FR'OGS.

Specification forming part of Letters Patent No. 137,085, dated March2F, 1873.

,To all 'whom 'it may concern:

Be it known thatl, JOHN H. LAKEY, o' Turner, in the county of Du Pageand State of I1- linois, have invented a certain new and ImprovedRailway Frog; and I do hereby declare that the following is a full,clear, and complete description of the same, reference being had to theaccompanying drawing makin g part of this specification.

Figure l is a plan view of the frog. Fig. 2 is a side view. Fig. 3 is anend view.

Like letters of reference refer to like parts in the several views.

The nature of this invention relates to a railway frog 5 and the objectthereof is to secure the two ends of the rails together of which thefrog is constructed so that they cannot become separated-#an event towhich all frogs of this class are 1iable,but which defect is removedwhen the rails are secured to each other in the Ina-nner as follows.

In the drawing, A represents the ties on which the rails B C are laidand thereto secured. The ends of said rails are iitted to each other,forming a tapering point, D, and are secured thus by flat keys a, Fig.2,inserted in corresponding holes cut through the web of the two rails.

The ordinary wayot' securing the rails together is by the use of roundiron bolts. These are very liable to be cut OE by the edges of theboltholes in consequence of the vertical move` ment of the rails causedby the passing train, which thereby act like a pair of shears on thebolts. To prevent this cutting the bolts I use in place thereof the fiatkey c referred to, the advantage of which is that it presents a largerbearing-surface to the vertical movement ot' the rail than a bolt; hencesuch movement is partially prevented, and the keys remain uncut oruninjured in consequence of their broad dat surface.

Claim.

What I claim as my invention, and desire to secure by LettersPatent, is

The broad iiat key or keys, as above described, in combination with therails B C ofl a railway frog, substantially in the manner as and for thepurpose set-forth.

Witnesses: JOHN H. LAKEY.

J CHN WEST, GEo. R. ALLIsoN.

